A young Afghan vendor waits for customers to buy sheep's heads at a roadside stall at the busy market in Kabul on November 29, 2015. (Photo by Wakil Kohsar/AFP Photo)

An Afghan National Army (ANA) soldier keeps watch as a young girl stands in front of her house in Dand Ghori district of Baghlan province, Afghanistan March 15, 2016. (Photo by Omar Sobhani/Reuters)

Afghan boys carry toys for sale as they walk along a road in Kabul March 22, 2016. (Photo by Ahmad Masood/Reuters)

Afghan blacksmiths work at their shop in Kabul, Afghanistan March 24, 2016. (Photo by Mohammad Ismail/Reuters)

Afghan boys enjoy on a hilltop during a windy day in Kabul, Afghanistan April 26, 2016. (Photo by Mohammad Ismail/Reuters)

Afghan school girls pose for a photograph at a makeshift camp due to lack of proper school buildings, in Herat, Afghanistan, 22 March 2016. Although the Afghan Government and foreign NGOs have taken initiatives to enroll school children across the country, millions of children of school age remain deprived of education and illiteracy is still widespread. (Photo by Jalil Rezayee/EPA)

An Afghan day-labourer pauses as he moves coal onto waiting trucks on the outskirts of Mazar-i-Sharif on April 12, 2016. (Photo by Farshad Usyan/AFP Photo)

Afghan farmers extracts raw opium to be processed into heroine at a poppy field in Helmand, Afghanistan, 07 April 2016. Afghanistan is listed as the world's largest opium producer. (Photo by Watan Yar/EPA)

In this Monday, April 11, 2016 photo, an Afghan child carries a shovel on his shoulder as he walks in a poppy field in Zhari district of southern Kandahar province, Afghanistan. A recent uptick in violence across the south will worsen once the poppy crop is harvested in coming weeks and the extremists deploy gunmen to protect their vast smuggling empire, officials, analysts and diplomats are predicting. (Photo by Allauddin Khan/AP Photos)

A health worker administers a Polio vaccine to a child, in Sarhrood districts of Nangarhar, Afghanistan, 18 April 2016. Afghanistan is one of the two countries along with neighbouring Pakistan where polio is still endemic, crippling hundreds of children every year. (Photo by Ghulamullah Habibi/EPA)

In this photograph taken on April 25, 2016, Afghan labourer Sakhidad 24, works in a chalk factory on the outskirts of Mazar-i-Sharif. (Photo by Farshad Usyan/AFP Photo)

In this photograph taken on March 25, 2016, an Afghan bird vendor looks on as he waits for customers on a roadside in Mazar-i-Sharif. (Photo by Farshad Usyan/AFP Photo)

Afghan butchers wait for the customers while water enters into their shops, after few days rainstorm in Kabul, Afghanistan, Saturday, April 2, 2016. Kabul Afghanistan's major cities do not have canalization system for rain and flood water. (Photo by Massoud Hossaini/AP Photos)

An Afghan amputee practices walking with her prosthetic leg at one of the International Committee of the Red Cross (ICRC) hospitals for war victims and the disabled in Kabul on April 3, 2016. The ICRC orthopaedic project was set up in 1988 in Kabul. (Photo by Shah Marai/AFP Photo)